Don’t be scared the dentist may say something to you about it but they will not yell at you.. It is your parents that may be upset since they are the ones paying for you to have the braces in the first place. (that is that I am guessing you are a minor) Either way just try and be better about wearing the required rubber bands and or head-gear if you do not, you are only going be in the braces for a longer time period. Who wants that. ?